Discontinued (May, 2023)

Released 1999
Warranty Period 3-year

This power supply is manufactured by SMD technology. The stress to P.C.B like twisting or bending causes the defect of the unit, so handle the unit with care.
※There is no recommended switching product.

Features of VAF503

• P.C. board mount AC-DC converter
• Built-in inrush current and overcurrent protection circuits
• Small and compact size

Ordering Information and Options

VAF(1)  5(2)  05(3)  

(1) Series name
(2) Output wattage
(3) Output voltage


Contents Specifications
Input Voltage AC85 - 264V 1Φ or DC110 - 370V
Output Wattage 3.3W
Voltage/Current 3.3V 1.0A (Peak: 1.2A)
Adjustable  Voltage Range Fixed
Protection Circuit And Others Overcurrent Protection Works over 125% of rating and recovers automatically
Overvoltage Protection Works over 115% of rating (By zener diode clamping)
Remote ON/OFF -
Remote Sensing -
Others -
Operating Temperature/Humidity -10 to +71℃, 20 - 90%RH (Non condensing) *
Safety And Noise Regulations Agency Approvals (At only AC input) UL60950-1, C-UL, EN62368-1 Complies with DEN-AN and IEC60950-1
Conducted Noise Complies with FCC-B, VCCI-B, CISPR22-B, EN55022-B
High Attenuation -
Others Dimensions (WxHxD) 32x20x72.5mm [1.26x0.79x2.85 inches]
Weight 30g max
Cooling Method Convection
Warranty Period 3-year
  • * For further information and how to use, please see in Cosel product catalog.

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Technical Data
  • * For another documents aren't listed, please feel free to contact to a Cosel representative.
Table1 Product Status Information
No. Product Status Definition
1 New Product New Product. Recommended for new design.
2 Recommended Recommended for new design.
3 blank Product in mass production
4 NRND Not recommended for new design.
5 To be discontinued PDN (Product Discontinuation Notice) is issued and LTB (Last Time Buy) is under consideration.
6 Discontinued LTB order is no longer available.